Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d2378bf3d1f762…

MALICIOUS

PDF

17.1 KB Created: 2019-05-02 05:11:28 +01:00 Authoring application: mPDF 5.7
MD5: 26dcb73b588b0a8020f39c0f81b8d2cf SHA-1: f73382781df8df4473f55ff447bf81d988290eb5 SHA-256: 71d2378bf3d1f7628453fd4f29d7d745a974595a31bf69ad85b5928af9a50786
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. While many of these URLs were labeled as confirmed benign, the sheer volume and the ML_NYX_PDF_MALICIOUS flag indicate a malicious intent, likely for SEO manipulation or to redirect users to potentially harmful content. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://cefasfese.4pu.com/2738735736738738/Wicked-Nights-With-a-Lover-The-Penwich-School-for-Virtuous-Girls-3-by-Sophie-Jordan.pdf
    • http://cefasfese.4pu.com/3739738735733731/In-Scandal-They-Wed-The-Penwich-School-for-Virtuous-Girls-2-by-Sophie-Jordan.pdf
    • http://cefasfese.4pu.com/3730733730732731/Too-Wicked-to-Tame-by-Sophie-Jordan.pdf
    • http://cefasfese.4pu.com/3738732734735739/Mrs-Smith-s-Spy-School-for-Girls-Mrs-Smith-s-Spy-School-for-Girls-1-by-Beth-McMullen.pdf
    • http://cefasfese.4pu.com/4732734730739737/The-Girls-In-the-Back-of-the-Class-They-re-High-School-Girls-With-Secrets-Trouble-And-Two-Choices-Dropping-Out-Or-Trusting-Her-by-LouAnne-Johnson.pdf
    • http://cefasfese.4pu.com/3738734736737736/The-Lover-by-Nicole-Jordan.pdf
    • http://cefasfese.4pu.com/2734736737739731/The-Wicked-Lover-Georgian-2-by-Julia-Ross.pdf
    • http://cefasfese.4pu.com/5738730732731730/Vanish-by-Sophie-Jordan.pdf
    • http://cefasfese.4pu.com/3730732736739733/One-Night-With-You-by-Sophie-Jordan.pdf
    • http://cefasfese.4pu.com/2732739732739737/Tease-The-Ivy-Chronicles-2-by-Sophie-Jordan.pdf
    • http://cefasfese.4pu.com/2730734733735734/My-Fair-Lover-Legendary-Lovers-5-by-Nicole-Jordan.pdf
    • http://cefasfese.4pu.com/2737733730738731/The-Earl-in-My-Bed-Forgotten-Princesses-2-5-by-Sophie-Jordan.pdf
    • http://cefasfese.4pu.com/2738739734737735/Hot-Boss-Wicked-Nights-by-Anne-Oliver.pdf
    • http://cefasfese.4pu.com/5731732732/Rise-of-Fire-Reign-of-Shadows-2-by-Sophie-Jordan.pdf
    • http://cefasfese.4pu.com/3734739731734735/While-the-Duke-Was-Sleeping-The-Rogue-Files-1-by-Sophie-Jordan.pdf
    • http://cefasfese.4pu.com/4730735731736/Wicked-Nights-Angels-of-the-Dark-1-by-Gena-Showalter.pdf
    • http://cefasfese.4pu.com/1732732735738739/The-Duke-Buys-a-Bride-The-Rogue-Files-3-by-Sophie-Jordan.pdf
    • http://cefasfese.4pu.com/5733734733737736/Tease---Verlangen-nach-Gl-ck-Ivy-Chronicles-2-by-Sophie-Jordan.pdf
    • http://cefasfese.4pu.com/3734738739730730/Hell-Breaks-Loose-Devil-s-Rock-2-by-Sophie-Jordan.pdf
    • http://cefasfese.4pu.com/3739734733734734/How-to-Lose-a-Bride-in-One-Night-Forgotten-Princesses-3-by-Sophie-Jordan.pdf

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